Segment Reporting - Segment Breakout (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Segment Information
Total revenues	$ 410,791	$ 412,237	$ 1,123,796		$ 1,618,519
Depreciation and Amortization	6,994	4,796	21,176		13,715
Income tax expense (benefit)	4,476	12,192	22,273		76,864
Interest and Dividend Expense	76,270	43,035	176,719		163,749
Dividend expense	29,800	2,500	40,700		6,100
Dividend revenue	109,400	5,800	125,100		17,900
Consolidated Funds
Segment Information
Dividend revenue			0		0
Operating Segments
Segment Information
Non-Interest Revenue	372,312	372,033	1,006,141	[1]	1,468,891	[1]
Interest Revenue	38,476	40,202	117,648		149,621
Total revenues	410,791	412,237	1,123,796		1,618,519
Operating Segments | Consolidated Funds
Segment Information
Interest Revenue	3	2	7		7
OpCo | Operating Segments
Segment Information
Non-Interest Revenue	416,865	373,695	1,059,952		1,469,034
Interest Revenue	38,364	40,025	117,464		149,033
Total revenues	455,229	413,720	1,177,416		1,618,067
Interest Expense	45,264	39,592	132,294		153,542
Depreciation and Amortization	6,988	4,791	21,158		13,701
Income tax expense (benefit)	10,127	13,484	27,923		80,333
Asset Co | Operating Segments
Segment Information
Non-Interest Revenue	(44,553)	(1,662)	(53,811)		(143)
Interest Revenue	112	177	184		588
Total revenues	(44,438)	(1,483)	(53,620)		452
Interest Expense	1,211	901	3,724		4,106
Depreciation and Amortization	6	5	18		14
Income tax expense (benefit)	(5,651)	(1,292)	(5,650)		(3,469)
Asset Co | Operating Segments | Consolidated Funds
Segment Information
Interest Revenue	$ 3	$ 2	$ 7		$ 7

[1] Includes dividend revenue of $109.4 million and $5.8 million for the three months ended September 30, 2022 and 2021, respectively and $125.1 million and $17.9 million for the nine months ended September 30, 2022 and 2021, respectively. Dividend revenue, consolidated funds, was immaterial for the three and nine months ended September 30, 2022 and 2021, respectively.